1. Balıkesir University, Department of Mathematics, Balıkesir, Turkey
2. Department of Mathematics and General Sciences, Prince Sultan University, Riyadh, Saudi Arabia
3. Université de Sousse, Institut Supérieur d’Informatique et des Techniques de Communication, H. Sousse, Tunisia + China Medical University Hospital, China Medical University, Taichung, Taiwan + Department of Mathematics and Applied Mathematics, Sefako Makgatho Health Sciences University, Ga-Rankuwa, South Africa